¿Qué es la energía de biomasa?

As countries worldwide move away from fossil fuels to lower their carbon footprints, they turn to renewable energy sources. Like coal, oil, gas, and other non-renewable energy sources, biomass releases carbon dioxide when burned. However, in contrast, it can actually be a carbon-neutral energy source. When organic materials used to make biomass are replaced in the environment, whether through replanting or farming, it provides a sustainable energy solution.

The versatility of biomass energy is a big part of what makes it so useful, as it can be used to generate heat directly or indirectly, to produce electricity, or in combination to supply both electricity and heat. Also, biomass can be turned into liquid fuel for vehicles or power generators. When done correctly, biomass energy production can help mitigate many of the negative impacts of refining fossil fuels, including damage to fragile ecosystems.

Cómo funciona la energía de biomasa

So, what is biomass energy? Essentially, biomass is just chemical energy stored in plants (and animals) that initially emanates from the sun. Photosynthesis generates plant biomass, whereas animal waste converted into biomass also comes from plants and animals that are eaten and discarded as waste through an animal’s feces or via death. Much of this biomass can be burned directly to generate heat, but it can also be converted into renewable fuels through various processes.

Las fuentes de energía de biomasa incluyen:

• Los cultivos energéticos específicos y los residuos agrícolas de plantas como algas, maíz, soja, pasto varilla y plantas leñosas se utilizan principalmente para la producción de biocombustibles.
• Human sewage and animal manure are used to produce methane and biogas.
• Solid waste from municipalities includes cotton clothing, discarded food, paper, tree branches, and other organic yard waste, wool, and other biogenic materials.
• Madera y residuos del procesamiento de la madera, incluyendo serrín, astillas de madera, pellets de madera y residuos de fábricas de papel y celulosa.

In many respects, energy from biomass is produced in the same way as that of fossil fuels, which are made up of long-dead plants and animals. The main difference between the two is that fossil fuels take millions of years to form and release carbon into the atmosphere when burned, whereas biomass relies on sustainable processes that remove carbon from the atmosphere. This is especially true for crops and other plants raised for energy production, which, when replanted, can make the process carbon neutral.

Procesos para convertir biomasa en energía

There are four main processes by which biomass is converted into energy. In direct combustion, burning organic matter produces heat energy. Thermochemical conversion uses biomass to produce gaseous, liquid, and solid fuels. Liquid fuels can also be made from biomass through a chemical conversion. Additionally, gaseous and liquid fuels can be made from biomass via biological conversion.

Combustión directa

The most common means for generating energy from biomass is direct combustion. Biomass can be used to create heat for buildings or industrial processes via burning it directly. Steam turbines can also use biomass for electricity generation via direct combustion.

Conversión termoquímica

The two main methods for converting biomass into energy thermochemically are gasification and pyrolysis, which use thermal decomposition to produce energy from biomass feedstock. This involves heating the feedstock material within gasifiers at high temperatures and pressures. The two processes differ in the amount of oxygen present and the processing temperatures used.

Pyrolysis uses a nearly oxygen-free environment to heat biomass to 800–900°F (427–482°C), producing fuels like biodiesel, bio-oil, charcoal, methane, and hydrogen. In bio-oil production, the process uses hydrotreatments via rapid pyrolysis that raises temperatures and pressures. Hydrotreating biomass can produce renewable jet fuels, gasoline, and diesel using a catalyst.

Con la gasificación, la biomasa se expone a temperaturas entre 1400 y 1700 °F (760 y 927 °C). El proceso también implica inyectar cantidades medidas con precisión de oxígeno libre, vapor o ambos para producir monóxido de carbono y gas de síntesis, un gas rico en hidrógeno. Los motores diésel y las turbinas de gas utilizados para la producción de electricidad pueden funcionar con gas de síntesis y utilizarse directamente para calefacción. Además, el hidrógeno se puede separar de este gas para pilas de combustible, que también pueden producir combustibles líquidos.

Conversión química

El proceso de conversión para transformar químicamente la biomasa se denomina transesterificación. Este proceso convierte las grasas animales, las grasas y los aceites vegetales, junto con otras grasas y aceites, en lo que se conoce como ésteres metílicos de ácidos grasos (FAME). Utilizados para producir biodiésel, los FAME se componen principalmente de triglicéridos. Se trata de tres largas cadenas de moléculas que contienen ácidos grasos lineales conectados a una molécula de glicerol. Esta conexión implica la desactivación de átomos de oxígeno para permitir la formación de nuevos enlaces químicos.

Inicialmente, el FAME implica un pretratamiento de la materia prima similar al refinado de los aceites vegetales comestibles. El paso principal para convertir la biomasa mediante este método consiste en eliminar los contaminantes y residuos, en particular los sólidos y las sustancias insaponificables, que son insolubles en agua pero se disuelven en disolventes orgánicos. Este proceso también puede utilizar materias primas procedentes de residuos para producir biodiésel, lo que implica convertir los ácidos grasos libres (FFA) en FAME. Para esta conversión se pueden utilizar diferentes ácidos, con o sin catalizadores, lo que implica altas temperaturas y presiones y, en algunos casos, alcohol.

Conversión biológica

Renewable natural gas and ethanol are produced via biological processes, including fermentation. Known as biomethane or biogas, sustainable natural gas can be made using anaerobic digesters that break down microorganisms in biological material within oxygen-free environments. As a sequence of processes, anaerobic digestion is used to produce fuel in sewage treatment plants and in various livestock operations, much as fermentation is used in food and drink production. Biological processes that produce biomethane also occur naturally in landfills for solid waste, which can be captured and used like natural gas sourced for underground gas fields.

Ethanol can be used as an additive to gasoline for gasoline-powered vehicles or in certain internal combustion engines that can run on 100 percent ethanol. Most fuel ethanol is made from fermented sugars found in grain starch – commonly from barley, corn, and sorghum – as well as from sugar from sugarcane and sugar beets. Fuel-based ethanol additionally contains denaturants that make it undrinkable.

Heyl Patterson: Equipos de procesamiento térmico para la conversión de energía de biomasa

Calcinadores rotativos

Rotary calciners made by Heyl Patterson can be used in biomass processes involving combustible, oxidation-sensitive, and heat-sensitive materials. With capabilities that separate the heat source from the material, our rotary calciners are well-suited for carbonizing biomass into charcoal or for the thermal pretreatment process of torrefaction to convert biogas into a coal substitute.

Specifications for our rotary calciners include:

• Puede fabricarse especialmente con materiales resistentes a altas temperaturas, a la corrosión o a ambas cosas.
• Diseños de flujo de gas que permiten el flujo de aire en la misma dirección o en dirección opuesta al material.
• Soporta temperaturas de funcionamiento de hasta 2200 °F (1204 °C).
• Con una longitud de más de 100 pies (30,48 metros) y un diámetro de hasta 12 pies (3,6576 metros).
• Varias configuraciones disponibles para la zona de calefacción.
• Funciona en atmósferas de proceso deshumidificadas, inertes, oxidantes o reductoras.

Secadores de lecho fluido

Heyl Patterson’s fluid bed dryers can handle free-flowing biomass materials, including those derived from grains, waste materials, and wood. Our fluid bed dryers use a fluidizing method that’s both energy-efficient and enables a high heat-transfer rate. Offering three types of fluid bed, dryers come with either a circular type, a trough-type, or a vibrating fluid bed.

Specifications for our fluid bed dryers include:

• Permite el uso de varios tipos de sistemas de control.
• Opción de diseño cilíndrico que mezcla por la parte posterior mediante flujo continuo o por lotes, lo que da como resultado un contenido de humedad no uniforme.
• Opción de diseño para medios fluidizados que pueden procesar materiales grumosos, pegajosos y otros materiales difíciles de manejar.
• Cuenta con una placa base fabricada en acero inoxidable o aleación resistente a altas temperaturas, o bien con un diseño de cúpula de ladrillo refractario.
• Soporta temperaturas de funcionamiento para gas de entrada de hasta 2200 °F (1204 °C).
• Opción de diseño rectangular de flujo pistón para flujo continuo, que permite diferentes entradas de gas y da como resultado un contenido de humedad uniforme.
• Tamaños de hasta 18 pies (5,4864 metros) de diámetro, o diagonal equivalente para diseños rectangulares.

Secadores rotativos

As one of the most versatile rotary dryers on the market, Heyl Patterson’s rotary dryers are capable of working with an array of biomass bulk solids. Our rotary dryers allow manufacturers to specify the moisture content at both the starting and finishing stages, biomass temperature, air temperature, air velocity, and retention time. Designs for our rotary dryers include external or internal water-cooled, counter-current air-swept, or combined cooling via both air and water.

Specifications for our rotary dryers include:

• Airflow systems that are forced-draft, induced-draft, or a combination of both
• Permite el uso de varios tipos de sistemas de control.
• Cuenta con un diseño de vuelo elevador que utiliza pruebas de materiales para establecer una mayor eficiencia en el transporte y el secado.
• Gas flow designs that allow airflow in the same or opposite direction to the material
• Soporta temperaturas de funcionamiento del gas de entrada de hasta 2200 °F (1204 °C).
• Con un tamaño de más de 100 pies (30,48 metros) de largo y hasta 16 pies (4,8768 metros) de diámetro.

Heyl Patterson makes a variety of other thermal processing equipment, including industrial dryers and flash dryers. To learn more about our products and services, contact our team today.

Last updated on April 6th, 2026 at 12:48 pm